IMO the tagline on the HN post is far more effective than the one on the site. I'd explain this to a friend as "Take a picture of your junk mail, and this app automatically unsubscribes you from it". Things like "save the earth" confuse me.
A description of how you actually unsubscribe would be helpful too, for the curious and the skeptical. "We automatically contact the junk-mailer for you and have you removed from their subscriber list."
1. Over 100,000,000,000 pieces of junk mail per year sent in the US
2. 18 pieces of junk mail for 1 that you actually care about
3. Several -months- of your life spent processing junk mail (!)
4. 100s of thousands of dollars spent by cities (ie, your tax money) on post processing, landfills, etc.
& Nevermind the carbon footprint from manufacturing, processing & delivery of junk mail...
re Description: check!
Cheers,
s
The snippet explained me the entire app. Perhaps some of it belongs on the home page.
How does PaperKarma work?
The PaperKarma app enables you simply snap a picture of
your unwanted junk mail, press Send, and get
unsubscribed. That's it! Just snap your junk mail away.
(In about 24 hours you'll receive a notification that
you've been unsubscribed. You can always use the app to
check on the status of your unsubscribe requests.)
Those stats are great hooks, but I doubt your potential users would need convincing. You stop spam for yourself first and foremost, that it helps the environment is a nice add-on.